<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
  <h1>登录页面</h1>
  <input type="text" v-model="user.username" placeholder="用户名">
  <input type="password" v-model="user.password" placeholder="密码">
  <input type="button" value="登录" @click="login()">
</div>

<!--引入axios和vue框架-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.6.14/vue.min.js"></script>
<script>
    let v = new Vue({
            el:"body>div",
            data:{
              user: {username: "", password: ""},

            },
            methods: {
              login() {
                axios.post("/login", v.user).then(function (response) {
                  if (response.data == 1) {
                    alert("登录成功！");
                    location.href = "/";
                  }else if (response.data == 2) {
                    alert("用户名不存在");
                  } else {
                    alert("密码错误！");
                  }
                })

              }
            }
        })
</script>

</body>
</html>